<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!-- 通过循环先获取scope再循环拿出指定内容   vcenter样式对图标居中-->
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级权限和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      <!-- 角色的id和权限的id都传给removeRightById -->
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
                    {{scope.row}}
                </pre>  显示角色下的关系-->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <!-- 修改按钮 通过scope.row.id来查询用户-->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.roleId)"
            ></el-button>
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRoleById(scope.row.roleId)"
            ></el-button>
            <!-- 分配角色 -->
            <el-tooltip
              effect="dark"
              content="分配权限"
              placement="top"
              :enterable="false"
            >
              <el-button
                type="warning"
                icon="el-icon-setting"
                size="mini"
                @click="showSetRightDialog(scope.row)"
              ></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
        <!-- prop是校验规则 -->
      </el-table>
    </el-card>

    <!-- 添加用户   监听表单的close事件-->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="70px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="70px"
      >
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <!-- prop是校验规则 -->
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <!-- 底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
    >
      <!-- ref是权限 -->
      <!-- 树形控件 通过prop来指定哪个属性 通过elememnt来获取具体的选择框show-checkbox和node-key-->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        @close="setRightDialogClosed"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>



<script>
export default {
  name: "Roles",
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      //   添加用户的表单的显示与隐藏
      addDialogVisible: false,
      //   添加角色
      addForm: {
        roleName: "",
        roleDesc: "",
      },
      // 添加表单验证
      addFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: false, message: "请输入用户描述", trigger: "blur" },
        ],
      },
      //   控制修改框的显示与隐藏
      editDialogVisible: false,
      //   查询用户信息对象保存
      editForm: {},
      // 修改用户对象的校验规则
      editFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      //   控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //   所有权限的数据
      rightslist: [],
      //  树形控件的绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      //   默认选中的节点数组
      defKeys: [],
      //   当前即将分配权限的角色id
      roleId: "",
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolelist = res.data;
      console.log(this.rolelist);
    },
    //   监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    addUser() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post("roles", this.addForm);
        if (res.meta.status !== 201) {
          return this.$message.error("添加角色失败");
        }
        this.$message.success("添加成功");
        //   隐藏添加用户对话框
        this.addDialogVisible = false;
        //   从新获取列表数据
        this.getRolesList();
      });
    },
    // 编辑修改用户的对话框
    async showEditDialog(roleId) {
      const { data: res } = await this.$http.get("roles/" + roleId);
      if (res.meta.status !== 200) {
        return this.$message.error("请求角色失败");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 监听用户修改框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 修改用户信息并验证
    editUserInfo() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) {
          return;
        }
        // 发起修改用户的预验证
        const { data: res } = await this.$http.put(
          "roles/" + this.editForm.roleId,
          { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("更新用户信息失败");
        }
        //    刷新数据列表
        this.getRolesList();
        //    提示修改成功
        this.$message.success("修改用户信息成功");
        //    关闭对话框
        this.editDialogvisible = false; //有问题
      });
    },
    // 根据id删除对应的用户信息
    async removeRoleById(roleId) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm(
        "此操作将永久删除该用户, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => {
        return err;
      }); //捕获错误消息并return出去
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消了删除");
      }
      const { data: res } = await this.$http.delete("user/" + roleId); //就是在修改用户里取到的id
      if (res.meta.status !== 200) {
        return this.$message.error("删除用户失败");
      }
      this.$message.success("删除用户成功");
      // 刷新一下数据
      this.getUserList(); //有问题
    },

    
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => {
        return err;
      });
      if (confirmResult !== "confirm") {
        return this.$message.info("取消删除");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      // 不需要调整个页面的权限来刷新数据，只需要下面这步直接把最新的数据返回给children
      role.children = res.data;
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      // 获取用户id
      this.roleId = role.id;

      // 获取到所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败");
      }
      // 把获取到的数据保存到data中
      this.rightslist = res.data;
      console.log(this.rightslist);

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);

      this.setRightDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有的三级权限，并保存到defksys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }

      node.children.forEach((item) => {
        this.getLeafKeys(item, arr);
      });
    },
    // 监听分配权限对话框的关闭事件，就是让上一个数据清空
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        //   从element中获取的两个方法
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedNodes(),
      ];

      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败");
      }
      this.$message.success("分配权限成功");
      //    更新一下数据
      this.getRolesList();
      //    把对话框隐藏
      this.setRightDialogClosed = false;
    },
    //
  },
};
</script>
<style scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>